[Paraview] Getting Blocks Selection

[Utkarsh Ayachit]

Rafael,

pqSelectionManager::getGlobalIDs takes all the necessary steps and then
delegates to vtkSelectionConvertor filter to do the actual conversion. So if
you fix vtkSelectionConvertor to convert from blocks to ids, then
pqSelectionManager::getGlobalIDs should automatically work. Look at
implementation of pqSelectionManager::getGlobalIDs to see how the two inputs
are set up.

Utkarsh

On Mon, Jun 15, 2009 at 3:06 PM, Rafael March <rafaelmarch3 at yahoo.com>wrote:

> Hi Utkarsh,
>
> thanks for the tip. I'm trying now to use the vtkExtractSelection filter,
> but it requires two inputs: a vtkSelection object, and the Model, whose
> block will be extracted, according to the selection. The question now is:
> how to get the vtkSelection object which corresponds to my current selection
> made in Paraview ? I can only manage to get a pqSelectionManager object in
> my filter.
>
> Thanks again for the help.
>
> Regards,
> Rafael.
>
> --- On *Mon, 6/15/09, Utkarsh Ayachit <utkarsh.ayachit at kitware.com>*wrote:
>
>
> From: Utkarsh Ayachit <utkarsh.ayachit at kitware..com>
> Subject: Re: [Paraview] Getting Blocks Selection
> To: "Rafael March" <rafaelmarch3 at yahoo.com>
> Cc: paraview at paraview.org
> Date: Monday, June 15, 2009, 3:13 PM
>
>
> Currently there's no direct way of converting from block to id-based
> selection. vtkConvertSelection does not handle the case where the input is a
> block-based selection.  Feel free to add a feature request to the bug
> tracker.
>
> A possible alternative would be to apply the ExtractSelection filter and
> then fetch the resulting dataset to the client. That will have the ids for
> the extracted block.
>
> Utkarsh
>
> On Mon, Jun 15, 2009 at 10:53 AM, Rafael March <rafaelmarch3 at yahoo.com<http://mc/compose?to=rafaelmarch3@yahoo.com>
> > wrote:
>
>>  Hi,
>>
>> I want to get the global Ids of the nodes selected through selection
>> inspector, using a "Block Selection" to choose a part of the model.
>>
>> I thought I would be able to retrieve the ids of the cells (or points)
>> with the method pqSelectionManager::getIndices() or
>> pqSelectionManager::getGlobalIds(), but none of them retrieve any Ids when I
>> make the selection of a block.
>>
>> Which is the right way to get this information ?
>>
>> Regards,
>> Rafael.
>>
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